HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Thailand

$401+ Cheap flights from Ontario (ONT) to Thailand

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
jul. 5 — jul. 121
sáb. 7/5
sáb. 7/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Thailand with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Thailand

Keep the following information in mind while searching for Ontario to Thailand flight deals. Data was last updated junio 30, 2025.

Round-trip from

$756
(FlightHub)

One-way from

$401
(CrystalTravel)

Popular in

December

Cheapest in

March

Average price

$1,229
From Ontario to Thailand
Search Deals
One-way flight from Ontario to Thailand
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Ontario to Thailand

Cheapest flights from Ontario to Thailand
Explore the most affordable flight options available from Ontario to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 30, 2025.

This FlightHub deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/236:25 amONT - BKK
2 stops28h 40mKorean Air
lun. 8/1811:30 pmBKK - ONT
2 stops31h 41mKorean Air
Deal found 6/27$756
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/206:45 amONT - BKK
2 stops25h 00mDelta
dom. 11/1611:15 pmBKK - ONT
2 stops38h 27mDelta
Deal found 6/27$778
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/276:00 amONT - CNX
2 stops27h 05mDelta
mar. 12/212:15 amCNX - ONT
2 stops37h 27mDelta
Deal found 6/29$779
This Korean Air deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/226:25 amONT - CNX
2 stops25h 30mKorean Air
lun. 7/2811:15 pmCNX - ONT
2 stops32h 01mKorean Air
Deal found 6/30$784
This oojo deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/911:45 pmONT - BKK
1 stop26h 55mSTARLUX Airlines
lun. 8/181:10 pmBKK - ONT
1 stop18h 30mSTARLUX Airlines
Deal found 6/27$808
This Flightnetwork deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/2412:45 amONT - BKK
1 stop19h 00mChina Airlines
lun. 9/810:50 amBKK - ONT
1 stop21h 50mChina Airlines
Deal found 6/30$812
This United Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/206:00 amONT - BKK
2 stops27h 55mUnited Airlines
mié. 9/39:35 amBKK - ONT
2 stops24h 58mUnited Airlines
Deal found 6/30$825
This Korean Air deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/46:25 amONT - BKK
2 stops25h 20mMultiple Airlines
lun. 8/1811:30 pmBKK - ONT
2 stops31h 41mMultiple Airlines
Deal found 6/28$832
This Booking.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/2711:45 pmONT - CNX
1 stop20h 40mChina Airlines
mié. 12/311:25 amCNX - ONT
1 stop20h 25mChina Airlines
Deal found 6/29$876
This Korean Air deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/186:45 amONT - HKT
2 stops47h 25mKorean Air
mié. 10/2211:25 pmHKT - ONT
2 stops31h 52mKorean Air
Deal found 6/27$919
This Trip.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/112:10 amONT - HKT
2 stops26h 45mMultiple Airlines
lun. 10/138:15 amHKT - ONT
2 stops47h 45mMultiple Airlines
Deal found 6/30$931
This Expedia deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/146:00 amONT - CNX
2 stops27h 40mMultiple Airlines
mié. 8/2012:45 amCNX - ONT
2 stops35h 57mMultiple Airlines
Deal found 6/30$931

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Thailand that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 30, 2025.
Use the filters below to find and compare flights from Ontario to Thailand that are best for you.

Fly from

Ontario

Fly to

Thailand

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mié. 7/23

6:25 am-1:05 am

2 stops28h 40m

Bangkok Suvarnabhumi

lun. 8/18

11:30 pm-5:11 pm

2 stops31h 41m

$756

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 10/20

6:45 am-9:45 pm

2 stops25h 00m

Bangkok Suvarnabhumi

dom. 11/16

11:15 pm-10:42 pm

2 stops38h 27m

$778

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

lun. 10/27

6:00 am-11:05 pm

2 stops27h 05m

Chiang Mai

mar. 12/2

12:15 am-10:42 pm

2 stops37h 27m

$779

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

mar. 7/22

6:25 am-9:55 pm

2 stops25h 30m

Chiang Mai

lun. 7/28

11:15 pm-5:16 pm

2 stops32h 01m

$784

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

sáb. 8/9

11:45 pm-4:40 pm

1 stop26h 55m

Bangkok Suvarnabhumi

lun. 8/18

1:10 pm-5:40 pm

1 stop18h 30m

$808

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 8/24

12:45 am-9:45 am

1 stop19h 00m

Bangkok Suvarnabhumi

lun. 9/8

10:50 am-6:40 pm

1 stop21h 50m

$812

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

mié. 8/20

6:00 am-11:55 pm

2 stops27h 55m

Bangkok Suvarnabhumi

mié. 9/3

9:35 am-8:33 pm

2 stops24h 58m

$825

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 8/4

6:25 am-9:45 pm

2 stops25h 20m

Bangkok Suvarnabhumi

lun. 8/18

11:30 pm-5:11 pm

2 stops31h 41m

$832

OntarioChiang Mai

ONT - CNX

ONTCNX

Ontario

lun. 10/27

11:45 pm-10:25 am

1 stop20h 40m

Chiang Mai

mié. 12/3

11:25 am-4:50 pm

1 stop20h 25m

$876

OntarioPhuket City

ONT - HKT

ONTHKT

Ontario

sáb. 10/18

6:45 am-8:10 pm

2 stops47h 25m

Phuket City

mié. 10/22

11:25 pm-5:17 pm

2 stops31h 52m

$919

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 35 results
1
2
3
4

Best time to book a flight from Ontario to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Thailand

What is the cheapest month to book a flight from Ontario to Thailand?

Currently, March is the cheapest month in which you can book a flight from Ontario to Thailand (average of $952). Flying from Ontario to Thailand in December is currently the most expensive (average of $1,573). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to TH?

Find hourly flight availability from Ontario to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Thailand as you normally would.

Reviews of airlines servicing Thailand

Get insights into the airlines that provide service to Thailand. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Thailand. Reviews last updated junio 30, 2025.
Peruse reviews from past customers who have flown with STARLUX Airlines, Korean Air, and China Airlines from Ontario to Thailand to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
187 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,101 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
745 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Delta
8.0
Very good
7,969 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Qatar Airways
7.4
Good
3,596 reviews
STARLUX Airlines
9.0
Wonderful
187 reviews

Overall

9.0

Comfort

9.0

Boarding

9.0

Entertainment

9.0

Crew

9.3

Food

8.8

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Thailand. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Thailand?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Thailand.

  • What are the cheapest airlines to fly from Ontario to Thailand one-way?

    One-way options have recently been found by users for as low as $401 on Korean Air. Other airlines that offer cheap prices include Delta from $435 and China Airlines from $473 one-way.

  • What are the most popular routes from Ontario to Thailand?

    Most travelers choose Ontario - Bangkok Suvarnabhumi, Ontario - Phuket City or Ontario - Chiang Mai when deciding on the best route from Ontario to Thailand.

  • Can I find deals for flights from Ontario to Thailand that include hotel bookings?

    Yes. In addition to deals on Ontario to Thailand flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Thailand?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Thailand.

  • Can I find deals for business class flights from Ontario to Thailand?

    Yes. Cheapflights offers flight deals from Ontario to Thailand by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Thailand?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Thailand (average of $952). Flying from Ontario to Thailand in December is currently the most expensive (average of $1,573). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Haneda flights
Los Angeles to Narita flights
San Francisco to Haneda flights
San Francisco to Narita flights
Los Angeles to Manila flights
Los Angeles to Suvarnabhumi flights
San Francisco to Manila flights
San Francisco to Hong Kong flights
San Francisco to New Delhi flights
Ontario to Narita flights
San Francisco to Ho Chi Minh City flights
Los Angeles to Incheon Intl flights
San Francisco to Suvarnabhumi flights
San Francisco to Taiwan Taoyuan Intl flights
San Francisco to Mumbai flights
Ontario to Haneda flights
San Diego to Narita flights
Los Angeles to Taiwan Taoyuan Intl flights
Los Angeles to Hongqiao Intl flights
Los Angeles to Ho Chi Minh City flights
Los Angeles to Pu Dong flights
Los Angeles to Kansai Intl flights
Los Angeles to Hong Kong flights
Ontario to Suvarnabhumi flights
San Francisco to Hongqiao Intl flights
San Francisco to Incheon Intl flights
Los Angeles to Singapore flights
Los Angeles to New Delhi flights
Los Angeles to Sung Shan flights
San Francisco to Pu Dong flights
Los Angeles to Don Mueang Intl flights
Burbank to Narita flights
San Diego to Haneda flights
San Francisco to Singapore flights
Los Angeles to Mumbai flights
San Francisco to Hyderabad flights
Los Angeles to Gimpo Intl flights
San Francisco to Islamabad flights
Ontario to Manila flights
San Francisco to Capital flights
San Francisco to Bangalore flights
Ontario to Taiwan Taoyuan Intl flights
San Jose to Manila flights
San Francisco to Kansai Intl flights
San Jose to New Delhi flights
Burbank to Suvarnabhumi flights
San Francisco to Sung Shan flights
Santa Ana to Narita flights
Los Angeles to Denpasar flights
San Jose to Mumbai flights

Top 4 airlines flying from Ontario to Thailand

Discover the top 4 airlines that operate flights from Ontario to Thailand. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$781Average$832FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$795Average$927FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$796Average$924FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$808Average$900FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.